1000 MW旋流对冲燃烧锅炉NO_x排放特性试验研究
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摘要
为了解采用OPCC旋流燃烧器、2层燃尽风布置的某1 000 MW超超临界前后墙对冲燃烧锅炉的NO_x排放特性,采用现场试验的方法对该锅炉进行了系统研究,得到燃烧器投运方式、炉膛氧体积分数、燃尽风挡板开度、燃烧器外二次风叶片角度、燃烧器内二次风挡板开度、燃烧器中心风挡板开度和燃尽风喷口外二次风刻度位置、燃烧器负荷分配方式、机组负荷及煤种等因素对NO_x质量浓度的影响。结果表明:燃烧器投运方式、炉膛氧体积分数及煤种对NO_x质量浓度的影响较大,影响幅度可达13%～20.2%;燃尽风挡板开度、燃烧器内二次风挡板开度、燃烧器负荷分配方式和机组负荷对NO_x质量浓度的影响较小,影响幅度为4%～6%;燃烧器外二次风叶片角度、燃尽风喷口外二次风刻度位置和燃烧器中心风挡板开度对NO_x质量浓度的影响微弱。
To find the NO_x emission characteristics of a 1 000 MW opposed firing boiler with OPCC swirl burners and 2 rows of overfire air(OFA) nozzles, field tests were conducted to study the effects of following factors on the NO_x emission behavior, such as the operation mode of burners, oxygen concentration in furnace, damper opening of OFA air, vane angle of outer secondary air, damper opening of inner secondary air, damper opening of central air, outer secondary air flow of OFA nozzle, load distribution of burners, unit load and coal category etc. Results show that the influence coefficients of burner operation mode, oxygen concentration and coal category on the NO_x emission are relatively high, which lie in 13%-20.2%; followed by the damper opening of OFA air, damper opening of inner secondary air, load distribution of burners, as well as the unit load, with influence coefficients in 4%-6%. The NO_x emission is slightly influenced by the vane angle of outer secondary air, outer secondary air flow of OFA nozzles and the damper opening of central air.
To find the NO_x emission characteristics of a 1 000 MW opposed firing boiler with OPCC swirl burners and 2 rows of overfire air(OFA) nozzles, field tests were conducted to study the effects of following factors on the NO_x emission behavior, such as the operation mode of burners, oxygen concentration in furnace, damper opening of OFA air, vane angle of outer secondary air, damper opening of inner secondary air, damper opening of central air, outer secondary air flow of OFA nozzle, load distribution of burners, unit load and coal category etc. Results show that the influence coefficients of burner operation mode, oxygen concentration and coal category on the NO_x emission are relatively high, which lie in 13%-20.2%; followed by the damper opening of OFA air, damper opening of inner secondary air, load distribution of burners, as well as the unit load, with influence coefficients in 4%-6%. The NO_x emission is slightly influenced by the vane angle of outer secondary air, outer secondary air flow of OFA nozzles and the damper opening of central air.
引文
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[9] 齐晓娟, 丁历威, 潘国清, 等. 1 000 MW超超临界四角切圆塔式锅炉燃烧器摆角变化对NOx排放影响的数值模拟[J]. 电力与能源, 2015, 36(3): 297-300. QI Xiaojuan, DING Liwei, PAN Guoqing, et al. Effect numerical simulation of 1 000 MW ultra-supercritical tangential tower boiler burner swing angles on NOx emission[J]. Power & Energy, 2015, 36(3): 297-300.
[10] 张冠群, 付琼. 1 000 MW超临界锅炉脱硝系统入口NOx影响因素分析[J]. 湖南电力, 2015, 35(6): 58-60. ZHANG Guanqun, FU Qiong. Influence factors analysis of denitration system inlet NOx values for 1 000 MW unit boilers[J]. Hunan Electric Power, 2015, 35(6): 58-60.
[11] 李超亮. 某1 000 MW超超临界旋流对冲锅炉外二次风叶片开度对燃烧及NOx排放影响的数值模拟[J]. 湖北电力, 2017, 41(5): 25-31. LI Chaoliang. Numerical simulation of effect of different outer secondary-air vane opening degrees on coal combustion characteristic and NOx emission in a 1 000 MW ultra-supercritical opposed swirling fired utility boiler[J]. Hubei Electric Power, 2017, 41(5): 25-31.
[2] 邹磊, 岳峻峰, 陈永生, 等. 1 000 MW超超临界锅炉低NOx燃烧技术改造及性能优化试验[J]. 中国电力, 2014, 47(10): 92-97. ZOU Lei, YUE Junfeng, CHEN Yongsheng, et al. Retrofit with low NOx combustion technique and performance optimization test for a 1 000-MW ultra supercritical boiler[J]. Electric Power, 2014, 47(10): 92-97.
[3] 曹勤峰, 李清毅. 1 000 MW燃煤机组超低排放低氮燃烧调整优化研究[J]. 电力与能源, 2016, 37(5): 600-604. CAO Qinfeng, LI Qingyi. Optimized adjustment of 1 000 MW coal-fired unit combustion with ultra-low NOx emission[J]. Power & Energy, 2016, 37(5): 600-604.
[4] 徐璁, 王智化, 许岩韦, 等. 优化配风对NOx生成的影响[J]. 燃烧科学与技术, 2016, 22(3): 241-246. XU Cong, WANG Zhihua, XU Yanwei, et al. Influence of optimizing OFA on NOx formation by numerical simulation[J]. Journal of Combustion Science and Technology, 2016, 22(3): 241-246.
[5] 徐亦淳, 翟德双. 1 000 MW机组降低锅炉NOx排放技术研究与应用[J]. 中国电力, 2015, 48(12): 85-90. XU Yichun, ZHAI Deshuang. Study and application of NOx emission reduction technology for 1 000-MW boilers[J]. Electric Power, 2015, 48(12): 85-90.
[6] 卞康麟. 1 000 MW机组塔式锅炉NOx排放的试验研究[J]. 江苏电机工程, 2014, 33(5): 73-75. BIAN Kanglin. Testing research on NOx emission characteristics of a 1 000 MW ultra-supercritical tower boiler[J]. Jiangsu Electrical Engineering, 2014, 33(5): 73-75.
[7] 邹磊, 梁绍华, 岳峻峰, 等. 1 000 MW超超临界塔式锅炉NOx排放特性试验研究[J]. 动力工程学报, 2014, 34(3): 169-175, 195. ZOU Lei, LIANG Shaohua, YUE Junfeng, et al. Experimental study on NOx emission of a 1 000 MW ultra supercritical tower type boiler[J]. Journal of Chinese Society of Power Engineering, 2014, 34(3): 169-175, 195.
[8] 汪华剑, 赵斯楠, 方庆艳, 等. 1 000 MW塔式锅炉中低负荷下低NOx排放优化[J]. 动力工程学报, 2016, 36(10): 765-772, 794. WANG Huajian, ZHAO Sinan, FANG Qingyan, et al. NOx emission optimization of a 1 000 MW tower boiler during medium and low load operation[J]. Journal of Chinese Society of Power Engineering, 2016, 36(10): 765-772, 794.
[9] 齐晓娟, 丁历威, 潘国清, 等. 1 000 MW超超临界四角切圆塔式锅炉燃烧器摆角变化对NOx排放影响的数值模拟[J]. 电力与能源, 2015, 36(3): 297-300. QI Xiaojuan, DING Liwei, PAN Guoqing, et al. Effect numerical simulation of 1 000 MW ultra-supercritical tangential tower boiler burner swing angles on NOx emission[J]. Power & Energy, 2015, 36(3): 297-300.
[10] 张冠群, 付琼. 1 000 MW超临界锅炉脱硝系统入口NOx影响因素分析[J]. 湖南电力, 2015, 35(6): 58-60. ZHANG Guanqun, FU Qiong. Influence factors analysis of denitration system inlet NOx values for 1 000 MW unit boilers[J]. Hunan Electric Power, 2015, 35(6): 58-60.
[11] 李超亮. 某1 000 MW超超临界旋流对冲锅炉外二次风叶片开度对燃烧及NOx排放影响的数值模拟[J]. 湖北电力, 2017, 41(5): 25-31. LI Chaoliang. Numerical simulation of effect of different outer secondary-air vane opening degrees on coal combustion characteristic and NOx emission in a 1 000 MW ultra-supercritical opposed swirling fired utility boiler[J]. Hubei Electric Power, 2017, 41(5): 25-31.